Force-Balanced Mixer Valve for Compact Hygienic Flow Control
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Solution Overview
Problem
Existing mixer valves for plumbing fixtures are large, complex, and often made of plastics, which promotes the growth of bacteria like legionella, posing health risks due to the large surface area in contact with water, and require separate control for temperature and flow rate, making them unsuitable for installation in shower enclosures.
Innovation Solution
A miniaturized mixer valve design with dual flow control valves, each with a diameter of approximately 6 mm, that are force-balanced to reduce the actuating force required, allowing for a smaller size and potentially made of metal, which reduces bacterial growth and integrates temperature and flow control in a single unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mixer valves are made with large surface area in contact with water, then flow control capability is improved, but bacterial growth is promoted
Solution Approach 1:
The patent changes the material parameter from plastic to metal (particularly stainless steel), which fundamentally alters the surface properties. Metal surfaces, especially stainless steel, have antimicrobial properties that inhibit bacterial growth while maintaining the necessary flow control surface area. This parameter change resolves the contradiction by allowing large surface area for flow control without promoting bacterial contamination.
2Measurement precision
If mixer valves are made large and complex, then temperature and flow control precision is improved, but device size and complexity increases
Solution Approach 1:
The patent merges the temperature control and flow rate control functions into a single integrated valve body. The mixer valve incorporates both hot and cold water mixing capabilities and flow regulation in one unit, eliminating the need for separate control mechanisms. This integration maintains precise control over temperature and flow while significantly reducing overall device complexity and size, making it suitable for compact shower enclosure installations.
Solution Approach 2:
The mixer valve is designed as a multi-functional device that simultaneously performs temperature mixing, flow rate control, and pressure regulation. By consolidating multiple functions into a single universal component, the patent achieves precise control capabilities without increasing device complexity, as the unified design eliminates redundant parts and control mechanisms.
3Ease of manufacture
If mixer valves are made of plastics, then manufacturing cost is reduced, but bacterial growth is promoted
Solution Approach 1:
The patent changes the material parameter from plastic to metal (particularly stainless steel), which fundamentally alters the surface properties. Metal surfaces, especially stainless steel, have antimicrobial properties that inhibit bacterial growth while maintaining the necessary flow control surface area. This parameter change resolves the contradiction by allowing large surface area for flow control without promoting bacterial contamination.
4Measurement precision
If separate control for temperature and flow rate is used, then control precision is improved, but device complexity and installation difficulty increases
Solution Approach 1:
The patent merges the temperature control and flow rate control functions into a single integrated valve body. The mixer valve incorporates both hot and cold water mixing capabilities and flow regulation in one unit, eliminating the need for separate control mechanisms. This integration maintains precise control over temperature and flow while significantly reducing overall device complexity and size, making it suitable for compact shower enclosure installations.
Data Source
AI summary
A plumbing fitting includes a housing and a missing valve. The housing includes a first aperture, a second aperture, a third aperture, and a mixing chamber in fluid communication with the first aperture, the second aperture, and the third aperture. The mixing valve is disposed within the housing. The mixing valve includes a first flow control valve that is configured to control a first flow of fluid from the first aperture to the mixing chamber.